/Engine/Source/Runtime/Slate/Public/Framework/Text/SlatePasswordRun.h
virtual int32 GetTextIndexAt ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [ILayoutBlock](API\Runtime\Slate\Framework\Text\ILayoutBlock) > & Block, const FVector2D & Location, float Scale, ETextHitPoint *const OutHitPoint ) const